Blackboard attachment.



G. T. SEGEE.

BLACKBOARD ATTACHMENT.

APPLICATION FILED 1AN.25. 1915.

1 1 86,689. Patented June 13, 1916.

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GERARD 'r. SEGEE, 0E REVERE, MASSACHUSETTS,

BLAGKBOARD ATTACHMENT.

Specification of Letters Patent. Patented June 13, 1916 Application filed January 25, 1915. Serial No. 4,899.

To all whom it may concern Be it known that I, GERARD T. SEGEE, a citizen of the United States, residing at Revere, in the county of Suffolk and State of Massachusetts, have invented certain new and usefulv Improvements in Blackboard Attachments, of which the following is a specification.

This invention relates to new and useful improvements in a blackboard attachment and more particularly to a trough for holding the chalk and eraser and for catching the dust from the chalk.

The primary object of the invention is the construction of a trough of this charac ter which may be easily attached to the blackboard and readily cleaned.

A further object of the invention is the construction of such a trough having a perforated movable portion through which the fine particles of dust will pass and which may be turned for depositing the heavy particles.

A still further object of the invention is the construction of a trough of this character having a perforated movable portion and means for limiting the movement of said movable portion.

A still further object of the invention is the provision of means whereby the trough may be readily cleaned.

With these and other objects in view the invention consists in the novel details of construction and arrangement of parts which will be more clearly understood from the following description and drawings, in which,

Figure 1 is a perspective view, "parts broken away, showing the trough connected to a blackboard. Fig. 2 is a top plan view, parts broken away. Fig. 3 is a transverse section on the line 3-3 of Fig. 2, and Fig. 4- is a detail of the trough bracket.

In the drawings the numeral 1 indicates a wall and 2 the blackboard.

The trough comprises the ends 3, the front wall 4:, the rear wall 5 of greater height than-the front wall, and provided with the perforations 6, and the longitudinal central depression 7 having a plurality of perforations 8 in the bottom thereof which may be closed by any suitable plugs. By providing the longitudinal central depression fiat bottom portions 9 are formed on either side of the central depression, the purpose of which will be presently described.

A rod 10 is mounted in the ends 3 of the trough and extends longitudinally thereof. \Vire fabric 11 is connected to the rod and is bent in such a manner as to form a channel for receiving the rod, as clearly shown in the drawings. The wire fabric is connected to the rod by the metal loop members 12 which are bent in such a manner to lie beneath the fabric and extend therethrough and over the rod 10. These metal loop members are further bent to form an extension 13 which is adapted to engage one of the fiat surfaces 9 of the trough, as clearly shown in the drawings. The opposite ends of the metal loop members are received within the longitudinal central depression of the trough.

In securing the'trough to the blackboard nails are passed through the perforations 6 in the rear wall 5 and to form an additional support I have provided a bracket, more clearly shown in Fig. l of the drawings, which engages the underside of the trough. This bracket comprises a plate 14: having perforations in the ends thereof whereby it may be attached to the wall, and a vertical opening therethrough adapted to receive the rod 15 which has the upper end bent to form a loop 16 and extension 17. It will be seen that the loop member 16 and extension 17 are of such a shape as to conform to the curvature of the underside of the trough and readily support the same.

From the above detailed description it will be seen that I have provided a trough which may be easily attached to any black board and which will normally support the chalk and eraser. The fine particles of dust from the chalk will pass through the wire fabric 11 and be received in the longitudinal central depression from which it may be removed through the perforations 8. There will be larger particles of chalk which will not pass through the wire fabric and when it is desired to dump these particles into the central depression it is only necessary that the wire fabric be revolved upon the rod 8. The fabric is normally held in position by the extension 13 engaging the bottom of the trough and this extension is used in turning the fabric and when turned engages the opposite side of the trough. The fabric is further used for cleaning the eraser by drawing the same over the fabric.

The dust may be removed from the trough, as above stated, through the perforations 8 by attaching a ViIUIiUIll cleaner thereto or by brushing the particles over the perforations and allowing them to fall therethrough. As stated in the detailed description any suitable plugs may be used for closing the openings. By having the rear wall of greater height than the front wall, whereby it is received between the wall and blackboard, it forms a tight joint between the blackboard and wall whereby it is impossible for water to enter between the blackboard and wall when the trough is being cleaned with water.

The trough is preferably formed of metal, but I desire it understood that any material may be readily used without departing from the spirit of the invention. By having it constructed of metal it can readily be cleaned by washing without materially affecting it.

Having fully described the invention what I claim as new and desire to secure by Letters Patent is:

1. A blackboard attachment comprising a trough having a longitudinal depression semi-circular in cross section, a rod rota- 'tably mounted in the ends of said trough and disposed centrally over the depression, and a perforated plate secured to said rod, said plate having a width approximately equal to the diameter of said depression.

2. A blackboard attachment comprising a trough having a longitudinal central depression semi-circular in cross section, a rod rotatably mounted in said trough and disposed centrally over the central depression, Wire fabric connected to said rod, said fabric having a width approximately equal to the diameter of said depression, and means for limiting the rotation of the rod.

3. A blackboard attachment comprising a trough having a longitudinal depression, a rod rotatably mounted in said trough over the depression, wire fabric secured to the 7 trough over said depression, wire fabric extending under the rod, and loop members extending over the rod and engaging beneath the wire fabric, said loop members limiting the rotation of the rod by engaging the trough.

6. A blackboard attachment comprising a trough having a longitudinal depression therein, a rod rotatably mounted in said trough over the depression, wire fabric extending under the rod, metal strips extending over the rod and under the fabric, one arm of said strips having a length equal to the radius of the depression and extensions formed 011 the other arm of said strips engaging the trough to limit the rotation of the rod.

7. A blackboard attachment comprising a trough, a rod rotatably mounted in the trough, a perforated plate having a longitudinal channel adapted to receive the rod, and means for connecting the plate to the rod, said means engaging the trough to limit the rotation of the rod.

In testimony whereof I aflix my signature in presence of two witnesses.

GERARD T. SEGEE.

Vitnesses HARRY R. LAWLER, CHARLES H. PAINE.

copiel of thin potent may be obtained for live cents each, by addressing the "Commissioner of Potenta, Washington, D. 0. 

